>Peacekeeping soldiers are paid by their own Governments according to their own national rank and salary scale. Countries volunteering uniformed personnel to peacekeeping operations are reimbursed by the UN at a standard rate, approved by the General Assembly, of a little over US$1,332 per soldier per month. http://www.un.org/en/peacekeeping/operations/financing.shtml
http://www.salaryexplorer.com/salary-survey.php?loc=151&loct...
I would suspect this is fairly lucrative.
It was also in the Clinton emails that were released (Chelsea Clinton was there and writing to her parents) https://foia.state.gov/searchapp/DOCUMENTS/HRCEmail_August_W...
"Speaking of censuses, the UN also needs a census of itself and its materials in country - including of the peacekeeper bases outside Port Au Prince. For example, we drove by 2 bases on the way to Cange and there were collectively, I would estimate, more than a hundred trucks and buses just sitting between the two, as well as at least 800 Napali soldiers (according to locals) laying effectively fallow - and I don't think anyone expects an outbreak of violence on the Central Plateau in the near future so even if they and their colleagues are deployed under UN Charter Chapter 6, surely preserving the peace could be interpreted to work with the settlements? At the least, their hardware could be used more effectively in Port Au Prince."
https://en.m.wikipedia.org/wiki/Opportunity_cost
Take their travel expenses and peacekeeping salaries and repurpose those as a practical domestic training program or foreign aid.
I only propose this as an alternative to the status quo, which apparently features useful practical lessons about sanitation, but only through trial and error in someone else's backyard.
On the other hand, deploying the nepalese soldiers equips them with practical experience (some of which might well have come in handy after the 2015 quake), and I assume they are fairly well paid on a UN mission too. Injecting some cash into Nepal is not a bad thing.